Section outline

  • lesson content

    Arnold is moving his chair around the room. He wants to fit it in a tight space so he decides to measure the chair and the space to see if the space is wide enough for the chair to fit. What metric unit of measurement should he use?
    ::阿诺德把椅子移到房间周围。他想把椅子放在紧密的空间里,所以决定测量椅子和空间,看椅子是否足够宽。他应该使用什么衡量单位?

    In this concept, you will learn how to choose  .

    ::在这一概念中,你会学会如何选择。

    Determining Units of Measure
    ::确定措施单位

    The common  metric units of length  are  millimeter , centimeter , meter  and  kilometer .  When making a measurement, you will need to choose which unit to use.
    ::通用测量单位的长度是毫米、厘米、米和公里。在进行测量时,需要选择使用哪个单位。

    A  millimeter  is the smallest unit. There are 10 mm in one centimeter, if an object is smaller than one centimeter, you would use millimeters. A scientist measuring something under a magnifying glass might use millimeters to represent a tiny specimen.
    ::一毫米是最小的单位。一厘米内有10毫米,如果一个物体小于一厘米,你就会使用毫米。测量放大镜下某物的科学家可能用毫米来代表一个微小的标本。

    A  centimeter  is the next smallest unit. You can use a ruler to measure things in  . If an object is the  length  of a ruler or smaller, then it makes sense to use centimeters to measure.
    ::一厘米是下一个最小的单位。您可以使用标尺来测量 。如果一个对象是标尺的长度或小于标尺的长度,那么使用厘米来测量是有道理的。

     are used to measure everything between the length of a ruler and the distance between things in a room.
    ::用于测量标尺长度与房间内事物之间的距离之间的一切。

    Most household objects such as tables, rooms, window frames, television screens, etc. would be measured in meters.
    ::大多数家用物体,如桌子、房间、窗框、电视屏幕等,将用米测量。

    Kilometers  are used to measure long distances. If you are looking to figure out the length of a road, the distance between two locations, etc, you would use kilometers.
    ::公里用于测量长距离。 如果您想了解道路的长度, 两个位置之间的距离等, 您将会使用公里 。

    Examples
    ::实例

    Example 1
    ::例1

    Earlier, you were given a problem about Arnold and his chair.
    ::阿诺德和他的椅子出了问题

    He is wondering if his chair will fit in a certain space. What metric unit of measurement would you recommend?
    ::他想知道他的椅子是否适合在一个空间里。

    First, determine if the chair is very small, small, medium or large.
    ::首先,确定椅子是很小、小、中还是大。

    Medium
    ::中 中

    Then, determine the type of units.
    ::然后,确定单位的类型。

    Meters
    ::计量器

    The answer is meters.
    ::答案是米。

    Example 2
    ::例2

    Jesse wants to measure his sofa. What unit of measurement should he use?
    ::Jesse想测量他的沙发 他应该用什么计量单位?

    First, determine if the object is very small, small, medium or large sized.
    ::首先,确定对象是否非常小、小、中或大。

    Medium
    ::中 中

    Then, determine the type of units.
    ::然后,确定单位的类型。

    Meters
    ::计量器

    The answer is meters.
    ::答案是米。

    Example 3
    ::例3

    Think about the example then choose the best unit to measure with.
    ::想想这个例子,然后选择衡量的最佳单位。

    The height of a picture on the wall
    ::墙上一幅图片的高度

    First, determine if the object is very small, small, medium or large sized.
    ::首先,确定对象是否非常小、小、中或大。

    Medium
    ::中 中

    Then, determine the type of units.
    ::然后,确定单位的类型。

    Meters
    ::计量器

    The answer is meters.
    ::答案是米。

    Example 4
    ::例4

    Think about the example then choose the best unit to measure with.
    ::想想这个例子,然后选择衡量的最佳单位。

    A caterpillar
    ::毛毛虫

    First, determine if the object is very small, small, medium or large sized.
    ::首先,确定对象是否非常小、小、中或大。

    Small
    ::小

    Then, determine the type of units.
    ::然后,确定单位的类型。

    Centimeters
    ::公厘米

    The answer is centimeters.
    ::答案是厘米。

    Example 5
    ::例5

    Think about the example then choose the best unit to measure with.
    ::想想这个例子,然后选择衡量的最佳单位。

    The width of a penny
    ::一便分的宽度

    First, determine if the object is very small, small, medium or large sized.
    ::首先,确定对象是否非常小、小、中或大。

    Very small
    ::非常小

    Then, determine the type of units.
    ::然后,确定单位的类型。

    Millimeters
    ::毫米

    The answer is millimeters.
    ::答案是毫米。

    Review
    ::回顾

    Choose the best metric unit for each measurement situation.
    ::为每个计量情况选择最佳衡量单位。

    1. A paperclip
      ::纸页剪贴纸
    2. The width of a dime
      ::角的宽度
    3. A tall floor lamp
      ::高地灯
    4. The width of a room
      ::会议室宽度
    5. A road race from start to finish
      ::从头到尾的公路竞赛
    6. The wing span of a butterfly
      ::蝴蝶的翅膀
    7. The wing span of an eagle
      ::鹰翅的翅膀
    8. A shoe size
      ::鞋尺寸
    9. The width of a window
      ::窗口宽度
    10. The floor space of a tent
      ::帐篷的地板面积
    11. The distance from the bottom of a mountain to the top
      ::从山底到山顶的距离
    12. The perimeter of a garden
      ::花园周边
    13. The area of a garden
      ::花园的面积
    14. The distance from one city to another
      ::从一个城市到另一个城市的距离
    15. The size of a fingernail
      ::指针大小
    16. The length of a small table
      ::小表格的长度
    17. A book
      ::一本书
    18. A cell phone
      ::手机
    19. The length of a room
      ::会议室的长度
    20. The distance from Boston to Cincinnati
      ::从波士顿到辛辛那提的距离

    Review (Answers) 
    ::回顾(答复)

    Click   to see the answer key or go to the Table of Contents and click on the Answer Key under the 'Other Versions' option.
    ::单击可查看答题键, 或转到目录中, 单击“ 其他版本” 选项下的答题键 。

    Resources
    ::资源